Thank you for the data and additional info.Alright guys, lets play nice and give him some data.
Here's my experience:
28 Nosler, 1:9 Twist, 180 Berger Hunting VLD, 3,200fps, 600 & 800 yards. Dead nuts on using Berger BC number and Ballistics AE on iPhone.
Gun had custom chamber for 180's at 3.6" COAL.